CN104722562B - The control technique of aerobe reactor landfill yard - Google Patents
The control technique of aerobe reactor landfill yard Download PDFInfo
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- CN104722562B CN104722562B CN201510111362.2A CN201510111362A CN104722562B CN 104722562 B CN104722562 B CN 104722562B CN 201510111362 A CN201510111362 A CN 201510111362A CN 104722562 B CN104722562 B CN 104722562B
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Abstract
The invention discloses the control technique of a kind of aerobe reactor landfill yard, use Zoning landfill and landfill waste is carried out aeration and leachate recirculation operation affect growth metabolism and the enzymatic reaction of microorganism in field, quickening urban life landfill waste biodegradation and sedimentation.Aeration and leachate recirculation operation control: leachate recirculation amount is calculated as 15%～30% with volume fraction；Recycling frequency is 2～3d/ time, and aeration frequencies is 1:1～1:2；Under early stage landfill waste is in basicly stable state, carries out follow-up landfill, can effectively accelerate the stabilisation process of landfill yard.Present invention process can substantially speed up the stabilisation process of landfill yard and the biodegradation reducing pollutional load and can effectively accelerating landfill waste, accelerates the stabilisation process of refuse landfill.
Description
Technical field
The present invention relates to municipal solid wastes disposal technology, especially aerobe reactor landfill yard is the most steady
Determine and pollution control technology field.
Background technology
Tradition garbage sanitary filling field component of refuse complexity, stabilisation required time length, percolate processing cost
The defects such as high, landfill yard operating cost is high, therefore tradition landfill yard has waste reduction and dissolves inadequate, closes
After safeguard that the supervision phase is long, risk is big, and landfill yard by drawbacks such as difficulties, significantly reduces sanitary landfills and disposes again
The competitiveness of technology.For solving the problems that conventional sanitation landfill exists, twentieth century later stage America and Europe and day
Country such as this grade takes the lead in having carried out the research of " biological respinse type " Landfill.Bioreactor landfill technology
The stabilisation of landfill yard can be accelerated, although and anaerobism and semi-aerobic bioreactor Landfill are to a certain degree
On accelerate the biodegradation of landfill waste, but the most inevitably inhibit the activity of aerobic microbiological,
Organic waste degradation speed is slow and degraded is incomplete, and stabilisation required time is long, CH during landfill4Isothermal
The generation of room gas exacerbates greenhouse effect, causes the further deterioration of global climatic environment.
Aerobe reactor Landfill is a kind of safe and efficient rubbish final disposal technology, and this technology is led to
Cross the governing factors such as aeration and leachate recirculation, the oxygen sufficient for landfill yard offer and water supply, therefore,
In landfill yard, aerobic microbiological population structure and activity are good, and growth metabolism is vigorous, can give full play to it to having
The degradation function of machine thing, therefore Organic substance complete decomposition, landfill yard is stably quick, is to have in garbage loading embeading technology
Machine garbage degradation the most thoroughly, the most quick Landfill.
The aeration frequencies of landfill waste and leachate recirculation frequency can directly affect the growth generation of microorganism in field
Thank and enzymatic reaction speed, affect the dissolubility of compound in field, and then affect the character of landfill percolate
With yield, affect biodegradation and the sedimentation of landfill waste, therefore, aeration frequencies and leachate recirculation frequency
It it is the key factor affecting aerobe reactor Landfill Stabilization Rate process.Control suitable aeration frequencies and
Leachate recirculation frequency, for improving the activity of microorganism and rubbish enzyme in landfill yard, accelerating landfill waste
Biodegradation, the stabilisation process tool of quickening landfill yard are of great significance.
Research for garbage loading embeading technology the most both at home and abroad lays particular emphasis on anaerobism and semi-aerobic rubbish Landfill,
Relevant control process control parameter about aerobe reactor landfill yard fast and stable is also rarely reported, because of
This, the further exploration to Solid Waste Treatment technology of the research aerobe reactor landfill critical technical parameter
Highly important strategic importance is had with technological reserve.
Summary of the invention
In view of the above deficiency of prior art, the present invention is based on this novel garbage loading embeading of aerobic landfill
Technology, it is provided that the key technology of a kind of aerobe reactor landfill yard fast and stable, for aerobic biological respinse
The fast and stable of device landfill yard and Environmental capacity provide important technical support.
The present invention solves its technical problem, be the technical scheme is that
The control technique of aerobe reactor landfill yard: landfill waste is carried out aeration and leachate recirculation
Operation affect growth metabolism and the enzymatic reaction of microorganism in field, quickening urban life landfill waste biodegradation
With sedimentation, it is characterised in that leachate recirculation amount is calculated as 15%～30% volume fraction with volume fraction；Return
Filling frequency is 2～3d/ time, and aeration frequencies (aeration time: intermittent time) is 1:1～1:2；Use Zoning landfill
Mode carry out garbage loading embeading, under landfill waste is in basicly stable state, carry out follow-up landfill.
Optimal processing parameter of the present invention is: controlling leachate recirculation amount is 20%, and recycling frequency is 2d/ time；
Aeration frequencies is 1:2, aeration time: the intermittent time is 0.5h:1h；The compacted density of rubbish body is 550kg/m3,
The biodegradation of landfill waste can be accelerated, reduce the pollutional load of landfill yard, accelerate aerobe reactor and fill out
Bury the stabilisation process of field.When temperature is relatively low, recharge percolate to 40～50 DEG C by heating, be conducive to
The stabilisation process of landfill yard.
Use the technological means of the present invention, aerobe reactor landfill yard fast and stable in the optimum amount of recharging and
Under the conditions of recycling frequency, the amount of recharging, aeration frequencies, temperature, compacted density, and it is in base at landfill waste
Carry out follow-up landfill under this steady statue, not only can reduce garbage filter output of fluid, reduce leachate contamination and bear
Lotus and intractability, also can substantially speed up the biodegradation of organic waste in landfill yard, improves the sedimentation of rubbish
Rate, accelerates the stabilisation process of landfill yard, saves operating cost.
The present invention is directed to landfill leachate treatment difficulty that refuse landfill faces, Solid Waste degraded slowly,
The problems such as Landfill Stabilization Rate time length, by carrying out leachate recirculation, aeration, the compacting of control landfill waste
Density and temperature control condition etc., promote growth of microorganism in landfill yard, accelerates the degraded of rubbish organic principle,
Lowering leachate contamination load, save landfill yard operating cost, accelerate Landfill Stabilization Rate process, raising is filled out
Bury a service life, reduce landfill yard construction cost, economize the land resource.
Accompanying drawing explanation
Accompanying drawing 1 amount of recharging affects figure to COD of waste leachate concentration
The changing trend diagram of pollutant under accompanying drawing 2 optimum condition
The changing trend diagram of follow-up loading embeading percolation liquid COD is carried out under the basicly stable state of accompanying drawing 3.
Detailed description of the invention
Below in conjunction with embodiment, the present invention will be further described:
Embodiment 1
The mode using artificial aeration carries out oxygen supply to rubbish body, carries out leachate reeirculation simultaneously.
The employing amount of recharging is 15%～30%, and in percolate, COD lowering of concentration is rapid, the most steady after 120d
Fixed, ammonia nitrogen less than 25mg/L, reaches the discharge standard of national regulation, the sedimentation of rubbish body at about 80d
Amount tends towards stability substantially at about 100d, and the biodegradation of rubbish is with conversion quickly；Leachate recirculation frequency
Being 2～3d/ time, the most basicly stable after COD concentration 150d in percolate, ammonia nitrogen reaches state at about 75d
The discharge standard of family's regulation；It is low that aeration frequencies is produced COD concentration in percolate by 1:1～1:2, and ammonia nitrogen exists
About 70d reaches the discharge standard of national regulation, aeration time: when the intermittent time is 0.5h:1h, percolate
The degradation rate of COD is the fastest, and rubbish settling amount is the highest.
Embodiment 2
Employing aeration frequencies is that 1:2 (aeration time: the intermittent time is 0.5h:1h) carries out oxygen supply to rubbish body,
Controlling leachate recirculation amount is 20% (V/V), and recycling frequency is 2d/ time, and the compacted density of rubbish body is
550kg/m3。
Aerobe reactor landfill place is produced COD in percolate and is steeply risen at initial landfill stage, and in the
9d drastically declines after reaching peak value 38 000mg/L, drops to 10 below 000mg/L to about 53d,
Until landfill end maintains 2 000mg/L after dropping to below 3000mg/L, 120d after 103d
Left and right；Initial landfill stage, ammonia nitrogen Rapid Accumulation in percolate, reach peak value 798.1mg/ in 21d, thereafter
Rapid decrease, less than country's household refuse landfill sites Environmental capacity standard (GB 16889-2008) after 53d
Percolate ammonia nitrogen discharge standard 25mg/L of defined；PH value rises to more than 8.0 in 45d, until real
Test end to maintain between 8.0～8.7 always；The accumulative settling amount of 0～45d landfill waste is linearly gone up
Rising, settling amount reaches the 76.61% of whole settling amount when 45d, and about 90d tends towards stability.
Showing that controlling leachate recirculation amount is 20% (V/V), recycling frequency is 2d/ time, and aeration frequencies is
1:2, aeration time: the intermittent time is 0.5h:1h；The compacted density of rubbish body is 550kg/m3, most beneficial for
The biodegradation of rubbish and conversion, with this understanding, the aerobic gas of Institute of Micro-biology is sufficient with moisture, landfill
In, micro organism quantity is high with activity, and the stable degree of rubbish is high, and rubbish body sedimentation speed is fast, is conducive to
Accelerate Landfill Stabilization Rate process.When temperature is relatively low, recharge percolate to 40～50 DEG C by heating, can
Further speed up the stabilisation process of aerobe reactor landfill yard.
Embodiment 3
The method of operation of landfill yard is with embodiment 1.
The too high amount of recharging (entirely recharging) or the too low amount of recharging (rain making) and 5%～10% return
Filling amount is all unfavorable for the biodegradation of rubbish, and during whole landfill, the relatively amount of recharging is 15%～30%
The amount high 10.2%～15.5% of reactor produced reproducibility organic pollution, ammonia nitrogen qualified discharge 10d～35d in evening,
Whole settling amount low 3.3%～13.3%, the amount of recharging is 15%～30% biodegradation that can effectively facilitate rubbish and turns
Change.
Preferably recycling frequency is conducive to accelerating the biodegradation of landfill waste, and the pollution reducing percolate is born
Lotus.Recycling frequency is produced reproducibility organic contamination by the reactor of 1d/ time, 5d/ time and 7d/ time relatively 2～3d/ time
The amount high 3.2%～35.9% of thing, ammonia nitrogen qualified discharge 3d～19d in evening, whole settling amount low 2.1%～3.3%, oozes
In filtrate, pollutional load is high, and stabilisation required time is long.
Aeration frequencies is 1:0.5,1:3 and the uninterrupted aeration reactor compared with 1:1～1:2 high 17.4%～22.7%,
Ammonia nitrogen qualified discharge slow 8～15d, whole settling amount low 1.5%～3.1%；Aeration time: the intermittent time is 0.5h:1h
Time, the degradation rate of percolate COD is the fastest, and at the end of experiment, COD concentration is 2200mg/L, relatively
Other aerations interval than reactor produced percolate COD concentration low 15.3%～26.6%, the removal of ammonia nitrogen
Effect is preferable, ammonia nitrogen qualified discharge during 67d, and garbage degradation speed is the fastest, and settling amount is the highest.
Embodiment 4
The method of operation of landfill yard is with embodiment 1.
Using the mode of Zoning landfill, follow-up landfill is basicly stable with completely stable rubbish at landfill waste respectively
Carry out on rubbish body, basicly stable refer to fill place produce percolate pH value be 7～8, percolate yield is in
The most stable, ammonia nitrogen and COD reduce from peak value, msw water content 55%～70%, rubbish body sedimentation amount
Follow-up landfill is carried out to time the most steadily from rapid subsidence.
After the landfill waste basicly stable (reactor A) rubbish body with complete stability (reactor B) is carried out
Continuous landfill, after follow-up landfill, the feature of reactor A and reactor B stable process is: filled for the first time
The impact that waste steady degree is different, in reactor A, microbial activity is higher, and microorganism is to organic in rubbish
The degradation speed of thing is very fast.During garbage degradation, msw water content first reduces to rise afterwards and reduces, reaction
In device A, msw water content is higher than reactor B, and maximum difference is 8.86%；During 60d, reactor A and
The TOC/TN ratio of B is down to 22.53 and 24.73 respectively, fat, protein, fiber in reactor A
Element respectively low compared with reactor B by 25.0%, 13.3%, 10.6%, settling amount is high by 9.6%.The pH of reactor A
Value takes the lead in being increased to more than 8.5, reaches the ammonia nitrogen discharge standard of national regulation in 60d, and relatively reactor B reaches
Mark discharge about 30d in advance, in the produced percolate of initial landfill stage reactor A, COD is higher than reactor B,
But the landfill later stage is low compared with the COD of reactor B, and after 100d, two reactor produced percolate COD become
In stable, maintain about 2 000mg/L.
Claims (3)
1. the control technique of aerobe reactor landfill yard, carries out aeration and diafiltration to landfill waste
Liquid recharges operation affects growth metabolism and the enzymatic reaction of microorganism in field, it is characterised in that
Leachate recirculation amount is calculated as 15%～30% with volume fraction；Recycling frequency is 2～3d/ time, exposes
The gas time: the intermittent time is 1:1～1:2；The mode using Zoning landfill carries out garbage loading embeading,
Follow-up landfill is carried out under landfill waste is in basicly stable state；Described landfill waste is in base
It is the most stable that this steady statue refers to that percolate yield is in, and now ammonia nitrogen and COD are from peak
Value reduces, pH value 7～8, msw water content 55%～70%, and rubbish body sedimentation amount is from the most heavy
It is down to the most steady.
The control technique of aerobe reactor landfill yard the most according to claim 1, it is special
Levying and be, controlling leachate recirculation amount is 20%, recycling frequency 2d/ time；, aeration time:
Intermittent time is 0.5h:1h；The compacted density of rubbish body is 550kg/m3.
The control technique of aerobe reactor landfill yard the most according to claim 1, it is special
Levy and be, when temperature is relatively low, recharge percolate to 40～50 DEG C by heating.
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